/* ========================================
   CASE STUDIES PAGE STYLES
   ======================================== */

/* Hero Section */
.case-studies-hero {
    padding: 140px 5% 80px;
    background: transparent;
    color: var(--color-text);
    text-align: center;
}

.case-studies-hero .hero-content {
    max-width: 900px;
    margin: 0 auto;
}

.breadcrumb {
    margin-bottom: 20px;
}

.breadcrumb ol {
    display: flex;
    justify-content: center;
    gap: 10px;
    list-style: none;
    font-size: 0.9rem;
    opacity: 0.9;
}

.breadcrumb li:not(:last-child)::after {
    content: "›";
    margin-left: 10px;
    opacity: 0.6;
}

.breadcrumb a {
    color: var(--color-text);
    text-decoration: none;
    transition: opacity var(--transition-fast);
}

.breadcrumb a:hover {
    opacity: 0.7;
    text-decoration: underline;
}

.case-studies-hero .section-label {
    color: var(--color-primary);
    margin-bottom: 15px;
}

.case-studies-hero .hero-title {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 800;
    margin-bottom: 20px;
    line-height: 1.2;
}

.case-studies-hero .hero-subtitle {
    font-size: 1.2rem;
    line-height: 1.6;
    color: var(--color-text-muted);
    margin-bottom: 40px;
}

/* Filter Buttons */
.case-filter {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin-top: 40px;
}

.filter-btn {
    padding: 10px 24px;
    background: var(--color-bg);
    color: var(--color-text);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-xl);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
}

.filter-btn:hover {
    background: var(--color-white);
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.filter-btn.active {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

/* Case Studies Grid */
.case-studies-grid {
    max-width: 1400px;
    margin: 0 auto;
    padding: 80px 5%;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
    gap: 40px;
}

.case-study-card {
    background: var(--color-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    opacity: 1;
    transform: scale(1);
}

.case-study-card.hidden {
    opacity: 0;
    transform: scale(0.95);
    pointer-events: none;
    position: absolute;
}

.case-study-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.case-card-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.case-image {
    position: relative;
    width: 100%;
    height: 280px;
    overflow: hidden;
}

.case-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.case-study-card:hover .case-image img {
    transform: scale(1.05);
}

.case-category {
    position: absolute;
    top: 20px;
    left: 20px;
    background: rgba(255, 255, 255, 0.95);
    color: var(--color-text);
    padding: 6px 16px;
    border-radius: var(--radius-xl);
    font-size: 0.85rem;
    font-weight: 600;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}

.case-content {
    padding: 30px;
}

.case-content h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 12px;
    line-height: 1.3;
}

.case-content p {
    color: var(--color-text-muted);
    line-height: 1.6;
    margin-bottom: 24px;
}

/* Case Metrics */
.case-metrics {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 24px;
    padding: 20px 0;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.metric {
    text-align: center;
}

.metric-value {
    display: block;
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--color-primary);
    margin-bottom: 4px;
}

.metric-label {
    display: block;
    font-size: 0.8rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

/* Case Tags */
.case-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.tag {
    background: var(--color-bg);
    color: var(--color-text);
    padding: 5px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 600;
}

.case-cta {
    color: var(--color-primary);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: gap var(--transition-base);
}

.case-study-card:hover .case-cta {
    gap: 12px;
}

/* Results Summary Section */
.results-summary {
    background: transparent;
    padding: 100px 5%;
    text-align: center;
}

.results-content {
    max-width: 1200px;
    margin: 0 auto;
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 60px;
    margin-top: 60px;
}

.result-stat {
    text-align: center;
}

.result-number {
    font-size: 4rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--color-primary), #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}

.result-plus {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--color-primary);
}

.result-label {
    display: block;
    margin-top: 12px;
    color: var(--color-text-muted);
    font-weight: 600;
    font-size: 1rem;
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--color-white);
    padding: 100px 5%;
    text-align: center;
}

.cta-content {
    max-width: 800px;
    margin: 0 auto;
}

.cta-content h2 {
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 800;
    margin-bottom: 20px;
}

.cta-content p {
    font-size: 1.2rem;
    opacity: 0.95;
    margin-bottom: 40px;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.btn-lg {
    padding: 16px 40px;
    font-size: 1.1rem;
}

/* ========================================
   INDIVIDUAL CASE STUDY PAGE STYLES
   ======================================== */

/* Case Study Hero */
.case-hero {
    padding: 140px 5% 80px;
    background: transparent;
    color: var(--color-text);
    text-align: center;
}

.case-hero-content {
    max-width: 1000px;
    margin: 0 auto;
}

.case-hero .section-label {
    color: var(--color-primary);
    margin-bottom: 15px;
}

.case-hero h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 900;
    margin-bottom: 24px;
    line-height: 1.2;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.case-hero .hero-description {
    font-size: 1.3rem;
    line-height: 1.6;
    color: var(--color-text-muted);
    margin-bottom: 40px;
}

.case-meta {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 40px;
    padding: 30px 0;
    border-top: 1px solid var(--color-border);
}

.meta-item h3 {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: 8px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.meta-item p {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text);
}

/* Case Content Section */
.case-content-section {
    max-width: 1000px;
    margin: 0 auto;
    padding: 80px 5%;
}

.content-block {
    margin-bottom: 60px;
}

.content-block h2 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-text);
    margin-bottom: 20px;
}

.content-block h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 16px;
    margin-top: 32px;
}

.content-block p {
    color: var(--color-text-muted);
    line-height: 1.8;
    font-size: 1.1rem;
    margin-bottom: 20px;
}

.content-block ul,
.content-block ol {
    margin-left: 24px;
    margin-bottom: 20px;
}

.content-block li {
    color: var(--color-text-muted);
    line-height: 1.8;
    font-size: 1.05rem;
    margin-bottom: 12px;
}

/* Highlight Box */
.highlight-box {
    background: var(--color-bg);
    padding: 40px;
    border-radius: var(--radius-md);
    border-left: 4px solid var(--color-primary);
    margin: 40px 0;
}

.highlight-box h3 {
    color: var(--color-primary);
    margin-top: 0;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin: 40px 0;
}

.stat-card {
    background: var(--color-bg);
    padding: 30px;
    border-radius: var(--radius-md);
    text-align: center;
    transition: transform var(--transition-base);
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-card .stat-number {
    font-size: 3rem;
    font-weight: 900;
    color: var(--color-primary);
    display: block;
    margin-bottom: 10px;
}

.stat-card .stat-label {
    color: var(--color-text-muted);
    font-weight: 600;
}

/* Image Grid */
.image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 40px 0;
}

.image-grid img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}

/* Full Width Image */
.full-width-image {
    margin: 60px 0;
}

.full-width-image img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
}

/* Quote Box */
.quote-box {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--color-white);
    padding: 50px 40px;
    border-radius: var(--radius-md);
    margin: 60px 0;
    text-align: center;
}

.quote-box blockquote {
    font-size: 1.5rem;
    font-style: italic;
    line-height: 1.6;
    margin-bottom: 20px;
}

.quote-box cite {
    display: block;
    font-size: 1rem;
    opacity: 0.9;
    font-style: normal;
}

/* Tech Stack */
.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin: 30px 0;
}

.tech-item {
    background: var(--color-primary);
    color: var(--color-white);
    padding: 10px 20px;
    border-radius: var(--radius-xl);
    font-weight: 600;
    font-size: 0.95rem;
}

/* Results Timeline */
.results-timeline {
    margin: 60px 0;
}

.timeline-item {
    display: flex;
    gap: 30px;
    margin-bottom: 40px;
    position: relative;
}


.timeline-item:last-child::before {
    display: none;
}

.timeline-marker {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.2rem;
    z-index: 1;
}

.timeline-content h4 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.timeline-content p {
    color: var(--color-text-muted);
}

/* Related Case Studies */
.related-cases {
    background: var(--color-bg);
    padding: 80px 5%;
}

.related-cases-content {
    max-width: 1400px;
    margin: 0 auto;
}

.related-cases h2 {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 60px;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .case-studies-hero {
        padding: 110px 5% 60px;
    }

    .case-studies-hero h1 {
        font-size: 2rem;
    }

    .filter-buttons {
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .case-studies-grid {
        grid-template-columns: 1fr;
        padding: 60px 5%;
        gap: 2rem;
    }

    .case-study-card {
        max-width: 100%;
    }

    .case-metrics {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .case-tags {
        flex-wrap: wrap;
    }

    .results-grid {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }

    .result-number {
        font-size: 3rem;
    }

    .cta-buttons {
        flex-direction: column;
        gap: 1rem;
    }

    .btn-lg {
        width: 100%;
    }

    .case-hero {
        padding: 110px 5% 60px;
    }

    .case-hero h1 {
        font-size: 2rem;
    }

    .case-meta {
        flex-direction: column;
        gap: 20px;
    }

    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 1.5rem;
    }

    .image-grid {
        grid-template-columns: 1fr;
    }

    .related-grid {
        grid-template-columns: 1fr;
    }

    .content-section {
        padding: 60px 5%;
    }

    .challenge-grid,
    .approach-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .case-studies-hero,
    .case-hero {
        padding: 100px 5% 50px;
    }

    .breadcrumb ol {
        flex-wrap: wrap;
        font-size: 0.85rem;
    }

    .filter-btn {
        padding: 8px 16px;
        font-size: 0.85rem;
    }

    .case-content {
        padding: 1.5rem;
    }

    .case-content h3 {
        font-size: 1.15rem;
    }

    .metric-value {
        font-size: 1.25rem;
    }

    .metric-label {
        font-size: 0.75rem;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .case-cta {
        font-size: 0.95rem;
    }
}

@media (max-width: 480px) {
    .case-studies-hero,
    .case-hero {
        padding: 90px 20px 40px;
    }

    .case-studies-hero h1,
    .case-hero h1 {
        font-size: 1.75rem;
    }

    .filter-btn {
        padding: 7px 14px;
        font-size: 0.8rem;
    }

    .case-image {
        height: 200px;
    }

    .case-content {
        padding: 1.25rem;
    }

    .results-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .result-number {
        font-size: 2.25rem;
    }

    .content-section {
        padding: 50px 20px;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .quote-box {
        padding: 1.5rem;
        margin: 2rem 0;
    }
}

/* Screen Reader Only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}